Apparatus for surfacing plate glass



May 30, 1933- J. L. DRAKE ET AL 1,911,269

APPARATUS FOR SURFACING PLATE GLASS Filed June 28, 1929 3 Sheets-Sheet l3mm 7 Q I John L. Dra/( e 1 Le Po Harm/7 y 1933- J. L. DRAKE El AL 1,269

APPARATUS FOR SURFACING PLATE GLASS Filed Jury 28, 1929 3 Sheets-Sheet 2Fl I: 3 Ubhn L.Dro/(e Le EOt/ L. Handy y 30, 1933- J. L. DRAKE ET AL1,911,269

APPARATUS FOR SURFACING PLATE GLASS Filed June 28, 1929 3 Sheets-Sheet 3I Z I v 4 6 T l I ll" 3 FIT- glvvuwdoo Jbhn LDmhe Le R07 L. HandPatented May 30, 1933 UNITED s'rA'r sj PATENT, v()F'FICE JOHN L. DRAKEAND Ln ROY L. HANDYLOF ronnno, OHIO, Assmnon-s To L IBlBE Y- .ownNs-ronnGLASS COMPANY, or ronnndorrro, iiconron'nrron on orrro.

- APPARATUS non SURFACING PLATE GLASS 1 Application filed June 28,

- The present invention relates to apparatus for surfacing plate glassor other flat sheets or plates and wherein the glass is carried on atrain of cars or tables beneath a series of grinding and polishingmachines.

It has for its primary object the provision of novel and improved meansfor effecting the desired movement of the cars or tables beneath thegrinders and polishers. The driv:

ing means herein provided for the cars or tables consists preferably of.a pair of independent drives engaging said tables and normallyoperating simultaneously and insynchronism so that the driving load willbe substantially divided therebetween. However, upon the failure ofeither drive to operate, the other drive will take up the entire loadand continue the movement of the tables so that the temporary break-downof either drive will not cause the movement of the tables to be stopped.According to this invention, the two independent drives are placed inpreferably close spaced, relation at the rear end of the train of carsor tables so as to propel them forwardly and each :drive includes adrive pinion meshing with rack bars secured to the undersides of saidtables. Means is also associated with each drivewhich will permit thedrive pinion thereof to idly rotate in engagement with the tables upon afailure of said drive to operate and while the other drive takes up theentire load. If desired, however, only one of the drive pinions need bepositively driven at one time so that the tables will be driven by asingle drive and the drive pinion of the second drive permitted to runidly, being driven-by the movement-of the tables. Upon failure of thefirst drive, the second drive can be placed in operation to assume theburden of moving the tables while'permitting the drive pinion; of thefirst drive to idly rotate. Another ob ject of the invention-is theprovision of apparatus for mounting the drive pinions so that either oneof said pinions may be low-. ered out of engagement with the rack bars.on the tables to facilitate the repairing or replacement thereof, or ofother parts of the driving mechanism, Without necessitating the stoppingof the'tables.

1929. Serial No. 374,403

Other objects and. advantages of, the invention will become :moreapparent during the course of the following description when taken inconnection with the accompanying drawlngs.

In. the drawings forming a part of this plication and wherein like'numeralsare em: pioyed to designate like parts throughout Fig. l is atop'plan view of driving ap paratns provided by the present inventionand shown in association with a train orseries of tables partiallybroken away.

wFig. 2 is a transverse section through the overrunning clutch takensubstantially on line 22 of Fig. l. y l 1 T Fig. 3 is a detail viewpartially in elevation and partially in section, said section beingtaken substantially on line3'3 of Fig. 2. V

F ig.,4 is a side elevation, partially in section, ofthe adjustablemounting, for each drive pinion, and e 5 i a Q I taken substantially onl .line 55of Fig. 4;,

Referring ;to the drawings, a plurality of. glass sheets 10 tobesurfaced and disposed end to end are adapted to be secured-upon the'topsof a series'ofmovable tables llby the aid of asuitable plastic material12such' as plaster of Paris orthe like. ;A desired number of tables 11are arranged in end to.

endabutting relation and are adapted to be moved continuously in a'definite substantially horizontal path to carrytheglass sheets firstbeneath a series of grindingun'its and then beneath a seriesofj'polishing units (not shown). The means herein provided for effectingthe desired horizontal movementof l3 and l l, said drives beingpreferably ar ranged in relatively'close spaced relation at the,rea rend of theline of tables so as to propel said tables forwardly. Inasmuchas" V pinion lfi -is arranged ,Iw-ithina casing 17 and.thetablesgcomprises the two separate drives is mounted therein uponashaft 18 j ournaled at its opposite ends in the side walls of saidcasing. Mounted adjacent the casing 17 s a fixed support 19 includingthe spaced hor zontal bearings 20 and 21 within which is journaled theshaft 22. Encircling the shaft within the bearings 20 and 21 are thebushings 23 and 24 respectively, said bushings projecting at their innerends beyond the bearings as indicated at 25. I The casing 17 is providedat one point'with a reduced extension 26 and this extension ispivotally.

mounted upon the inner projecting end portions 25 of the bushings 23 and24 as clearly shown in Fig. 5. Mounted 'upon shaft 22 and-located withinthe reduced portion 26 of'casing 17 is a spur gear 27 adapted to meshwith the drive, pinion 15.

Also mounted adjacent the casing 17 but in a position substantiallyopposite that of support 19, isa stationary vertical standard 28 withinwhich is carriedthe vertical lifting screw 29, said screw being adaptedto support upon its upper end the lug 30 carried by casing 17 at a pointsubstantially opposite the reduced portion 26 thereof. 7 The liftingscrew 29 has threaded thereupon a worm gear 31 and meshing therewith isa worm (not shown) but which is carried by the shaft 32 operated by handwheel 33. Thus, upon rotation of worm gear 31 the lifting screw 29 willbe threaded upwardly or downwardly therethrough and thus cause thecasing 17 to rock upon the bushings 23 and 24 to move the drive pinion15 into or out of engagement with the rack bars 16 on tables 11. Thus,should it be desirable or necessary for one reason or another to movethe pinion out of engagement with the rack bars on the tables, this canbe easily effected by simplyrotating the worm gear 31 to'cause thelifting screw 29 to be threaded downwardly therethrough. The standard 28is provided with a stop portion 34 adapted to limit the upward movementof lug 30 and this stop portion can'beso located thatwhen the lug 30abuts the same, the drive pinion will be' properly meshed with the rackbars on the tables;

Mounted in alignment with shaft 22 is a shaft 35 and these two shaftsare connected together by a suitable coupling designated in its entiretyby the numeral 36. This coupling comprises the interlocking couplingsections 37 and 38'carried by shafts 22 and 35 respec L tively, thesection 37 being loosely mounted on shaft 22 and the section 38 fixed toshaft 35. Associated with the shaft 22 is an overrunning clutcharrangement designated in its entirety by the niuneral 39 and comprisinga sleeve or hub 40 key-ed to shaft 22 and provided with a plurality ofratchet teeth 41 having wear plates 42 upon the fiat inner facesthereof. En'circling the sleeve 40 is an annular casing 43 provided atone point 653 thereof with an attaching-ear 44 secured by on and drivenfrom shaft 35.

suitable means 45 to a similar ear 46. formed on hub 47 loosely mountedupon shaft 22 and carried by and constituting a part of the couplingsection 37. Mounted within the side walls of the casing 43 are aplurality of spaced shafts 48' upon which. are mounted pawls 49 adaptedto engage ratchet teeth 41' and being normally urged into engagementtherewith by the leafsprings 50 secured at their inner ends as at 51.

nism and the drivingloadpositively driven,

the shaft 22 will be rotated upon the engagement of pawls 49 with theratchet teeth on sleeve 40, it'being remembered'that'the sleeve 49 iskeyed to shaft 22 while'the casing 43 carrying pawls 49is looselymounted there- I However, due to the provision of the overrunningclutches 39, each drive pinion will be permitted to idlyrotate inengagement with the rackjbars of the tables upon the failure of itsrespectivedrive to operate or should the drive be purposely stopped forthe making ofrepairs. Thus, should the motor 52 or the reduction gearinglocated in housings 53 and 54 break down. and fail to properly function,or should such parts need repairs and the motor 52 purposely stopped,the drive pinion 15 will be permitted to idly rotate in engage? mentwiththe tables, being driven along by the movement thereof. Upon idlerotation of the pinion 15, the sleeve 40 carrying" ratchet teeth'41 willbe permitted to rotate with respect to casing 43 and pawls 49 which willremain stationary. I Due to such an arrangement, the drive can berepaired without the necessity of removing the drive pinion fromengagement with 'the'tables. f Were the 5 overrunning clutch notprovided andshould the drive cease to; operate, the pinion would bebrought to a sudden stop and would cause a jamming of the apparatuswhich would stop the movement of the tables and probably cause breakage'of' parts of the apparatus.

It is to be understood that the form of {the invention herewith shownand described is to be taken as the preferred embodiment'of the same,and that various changes in the shape, size and arrangement of parts maybe re sorted to without departing from the spirit 7 of the invention orthe scope of the subjoin-ed claims. Z I We claim The shaft 35 is adaptedto'be driven from a'motor 52 through ioo 1. In sheet glass surfacingapparatusithe 1 combination with a series of tables adapted to carryglass sheets to be surfaced, ofdriving means for the tables including adrive pinion engaging said tables, a casing within which said drivepinion is mounted, a fixed support including spaced horizontal bearings,a shaft journ'aled in said bearings, said casing being pivotally mountedupon said fixed support, a gear mounted upon said shaft and in mesh withthe drive pinion, means for driving said shaft to rotate the gear andpinion to effect movement of the tables, and means for raising andlowering the casing about its pivot to move the drive pinion nto or outof driving engagement with said tables. 7

2. In sheet glass surfacing apparatus, the combination with a series oftables adapted to carry glass sheets to be surfaced, of driving meansfor the tables including a drive pinion engaging said tables, a casingwithin which said drive pinion is mounted a zfixed support includingspaced horizontal bearings, a shaft journaled in said. bearings,bushings encircling the shaft within said bearings and projectingtherebeyond attheir inner ends, said casing being provided with areduced extension pivotally mounted upon the inner projecting endportions of said bushings, a gear mounted upon said shaft and locatedwithin the reduced portion of said casing in mesh with the drive pinion,means for driving said shaft to rotate the gear and pinion to effectmovement of the tables, and means for raising and lowering the casingabout its pivot to move the drive pinion into and out of drivingengagement with said tables.

3. In sheet glass surfacing apparatus, the combination with a series oftables adapted to carry glass sheets to be surfaced, of a plurality ofindependent drives for the tables, each including a drive pinionengaging said tables, a casing within which said drive pinion ismounted, a fixed support including spaced horizontal bearings, a shaftjournaled in said bearings, said casing being pivotally mounted uponsaid fixed support, a gear mounted upon said shaft and in mesh with thedrive pinion, means for driving said shaft to rotate the gear and pinionto effect movement of the tables, an overrunning ciutch associated withthe drive to allow the drive pinion thereof to idlyrotate in engagementwith the tables, and means for raising and lowering the casing about itspivot to move the drive pinion into and out of driving engagement withsaid tables.

4:. In sheet glass surfacing apparatus, the

drive pinion, means for driving said shaft to rotate the gear andpinion'to effect movement of the tables, an overrunning clutchassociated with the drive to allow the drive pinion thereof to idlyrotate in engagement H with the tables, and means for raising andlowering the casing about its pivot to move the drive pinion into andout of driving engagement with said tables. V

Signed at Toledo, in the county'of Lucas,

and State of Ohio, this 20th day of June,

J OHN L. DRAKE. LEROY L. HANDY.

combination with a series of tables adapted I to carry glass sheets tobe surfaced, of a plurality of independent drives for the tables,eachincluding a drive pinion engaging said tables, a casing withinwhichfsaid drive pinion is mounted, a fixed support including spacedhorizontal bearings, a shaft ournaled in said bearings, bushingsencircling the shaft

